Continuous-screw press



Dec. 25, 1928.

S. HILLER CONTINUOUS scREw PRESS Filed Nov. 14, 1922 2 Sheets-Sheet l IHHI , www,

MINIMUM!! A TTORNEYS.

S. HILLER CONTINUOUSl SCREW PRESS Dec., 25, 192s. n i l1,696,401

Filed Nov. 14. 1922 2 Sheets-Sheet 2 if! j? o @um :l

N uufmjmn@ vPateifitecl Dec. 25, 1928'.

-PA'rENT* l srANpnr HILLER, or sAN Josrz, cALil'onNtA, AssIeNon To' STANLEY HILLER, INc.,

- or SAN JOSE, CALIFORNIA.

CONTINUoUs-sonnw Pansa.'

applicati@ mea November 14, 1era seriafNopecms.

My invention relates 'toimprovements in continuous screw presses.

More particularly the invention relates to improvements in relatively low pressure continuous screw presses which may be utilized for expressingmoisture from wet ren.- dered ifish, packing house oHal, tankage, coagulated blood and similar uses where pressures ranging under one thousandv pounds per square inch on the Vmaterial are ample.

lThe objects of the invention are to pro-- Vide novel and relatively cheap screen, press asy body, and screw structures which permit ready replacement of the screens when -worfn out, lpermit easy cleaning of the press, and provide eiiicient expressing arrangements. Other objects of the invention are suchI as may be attained by ay utilization ofthe novel combinations and subcombinations herein after particularly setdforth, and as dened in the terms of the appended claims:

Referring to the drawings- Fig. 1 is a top plan view of the press.

Fig. 2 is a View in side elevation and partly in section of the press.

Fig. -isav cross'section on the line of Fig. 2.

Fig. 4 is across section on the line 4- 4 or rig. 2.

Fig. 5 is a on the press. l ,V ,A

Fig. 6 .is a detailed viewo another one oi the screens for the press. Y

Fig. 7 is a plan view of the press showing the conveyor screw partly withdrawn. l

Fig.- 8 is a detailed view-inv longitudinal detail view of one of the screens section of the screw bearing head assembly.

Fig. 9 is a cross section through the press.' Fig. 10 is a view in elevation of the driven end of the press. l

The press (12) as shown .in detail in Figures 1 to 10 inclusive, comprises a shell horizontally divided in two sections (121) and (122) bolted or otherwise connected together'r by the flanges (128.), so as to make a cylin drical shell like structure. Both sections are madewith a multiplicity of openings (121).' l A v l y f` (1211) and the shaft is in turn' rotated by The material is introduced into one 'end o l u the press through the opening (12) and conveyed through the press (126). As the material is conveyed through thisA opening by the screwall theiiquid is expressed from the same. When fish is being handled of course? .through the perforations in the screen, perl mits the oil to pass so that it may. escape through the openings (124) into suitable collection receptacles which are supported under the press. These receptacles may be pans with A pipe communications leading into drums so that the oil may circulate from the pansthrough the pipes andvstored in the drums.` The pressing effects realized by the screw increases from the intake end of the press to the discharge end. In other words, the pressing eifectgradually increases as the material is forced towards the discharge end.l Consequently, special provisions must be 'made to prevent material from being forced through the screens where'the pressing eect is severe..` This is accomplished by using a double thickness of screens commencing as at (12B) The perforations of each layer of the screens varyin diameter as shown in Figures 5 and 6. "For instance, the screen sheeting (12) which will be the under layer will have perforations (121) larger than the perforations (1211 in the sheeting (1212). Only a single thickness (1218) ofthe screen need be used around the intake end. As shown in cross'section in Fi re 4, the screen sheetings-are made in horizontally divided curved sections corresponding to the divided Asections of the shell and the flanges (123) of th shell are rabbeted so as to receive and confine the flanges alongthe horizontal divi- .sion of the screen sections. This" samastructure also applies to the single thickness or screen sheeting (1218) vas shown in Figure 3. Of course, in this part ofthe press the screen`does not extend along the top of the internal opening in theipress, as the intake V (12") takes the place for the space of the same. The screw (12) is mounted on a shaft '-.arelativ'ely large driven gear .(1215) which isA mounted in driving relation to a smaller press as will presently bediselosed; lMountloor ed with freedom of rotation on` a spindle (1212) adjacent the opening (123) into the press is a four bladed wheel (1212). The blades of the same are pitched so as to straddle theA blades of the screw (123)y and the purpose of the same'is to prevent the' ma terial from backing up into the opening (125) when the pressure from packing in the discharge end is present. A cover (122) is made for the wheel and the cover, as well as the wheel itself, may be lifted off when the screw is withdrawn from the press. It will not be necessary to lift the wheel off if the screw is rotated out of the press a suflicient distance to leave the wheel disengaged from the last spiral of the screw.

` In the past considerable difficulties have been experienced with presses of this general character, that is to say those using a screw for realizing the pressing effect, due to the fact that when the plant is shut down there is always a certain amount of material left in the press, even though the bulk is run out. Asthis material contains a certain amount of moisture, especially after cookingy itv naturally has a tacky consistency and when it dries out it practically cements the screw to the sides of the pressy and otherwise binds the movable parts of the press; consequently when the plant is startedup again there is every likelihood that considerable damage might be done to the press due to the fact that the movable parts lmay possibly be bound. @ne of the principal features of the present press is to provide for a thorough cleaning which should take place without undue loss of time after the plant has been shut down. To provide for cleaning it is proposed to so construct therpress that the screw may be run out, thus enabling access to be had to the interior of the press so that all of the remaining material may be removed even from the perforations in the screens. These perforations, if they were not thoroughly cleaned, would be clogged with dry material. The shaft (1214) may or may not run through the screw (122), ,but in any event the enlarged end or head of the screw will have a shaft (1221) extending forwardly thereof and with the same threaded for a greater part of its length. Arranged parallel of the shaft (1221) on opposite sides of the press and extending forwardly thereof are frods (1222). These rods aremounted at one end to the head of the press as at (1223) with theirl opposite ends (1224) reduced in diameter and carrying a bearing head (1222), 4thehead havingan Outrigger bracket support (1226) with sleeves (1227)y on the ends thereof through which the reduced ends (1224) of the rods pass, suitable nuts being provided preventing the sleeves from becoming disengaged from the ends. The sleeves are mounted to slide on the reduced ends.

The bearing head (1223) is made with an Athe turning leverage of the wheel should occasion'demand. The sleeve (1222) is made with an Ainternal threaded opening (1223), the threads of which do not extend throughout the length of the opening, but terminate slightly over half-way of the length so as to leave an enlarged smooth opening (1234) in one end of the opening. The shaft (1221) is received'in the opening (1223) of the bear- .ing head and the threads on the shaft correspond to the threads in the opening but the smooth bore portion of the opening is of a diameter of that of the shaft, and while it is a snug'fit, the shaft is free to slide in this part of the opening without an undue amount of friction. The distance that the sleeves (1231) may slide on the' reduced ends (1221) of the rods (1222) is substantially the saine length as that of the smooth portion of the opening (1233) so that when the shaft is presented in theopening the bearing head may slide for-ward until the sleeves (1221) but against the larger diameter ofthe rods and the end of the shaft lcontacts with the beginning of the threads in the opening (1233). In this position by turning the wheel (1231) the threads in the opening (1233) will engage the threads on the shaft and draw the shaft outward. Primarily, the reason for the smooth bore in the opening (1233) is to provide a bearing for the end of the shaft and at the same time leave the shaft free to rotate. The head of the screw as previously mentioned is larger in the beginning of the same and is made with a disc `flange or the like (1233) which controls the lthat is to say the shaft (1221) being in the smooth bore of the opening (1223), and it is desired to withdraw the screw, the wheel (1221) is turned in a clock-wise direction so as to engage. the threads in the opening with the threads on the shaft; consequently a gradual pull will be imparted to the screw withdrawing it from the press. To enable the shaft (121) -to slide relatively of the 4drivengear (1213) a long key slot (1233) is made on the shaft so that the gear (1215) while mounted on the shaft to rotate therewith leaves the shaft free to slide through the bearing of the gear. Of course, to permounted same connected to a, collar (1238), which in gearmust have an abutment against the casting ofthe press. `To properly ide and support the shaft (1221) sleeves to slide on the rods (1222) with the turn is fixed to the shaft on the smooth portion thereof in the beginning of the threads. By this construction the screw 'may be -withdrawn, leavingthe interior of thep'ress accessible sthat the screw and other parts may be thoroughly cleaned. After it has been cleaned the screw may be returned by turning the wheels (1231) in a clock wise l direction.

I claim:

1. In a resshaving a shell into which the materia to be pressed is introduced, said shell having openings substantially throughout its surface, a screen fitted within the shell, a screw conveyor within said screen, a feed opening at one end of the shell, means for withdrawing the screw `out of the discharge end of t e shell, comprising a shaft on the screw conveyor extending beyond the discharge end of the shell, and an out-rigger bearing head for said shaft, the combination of means for imparting a pull tothe shaft for withdrawing the screw conveyor and a thrust to the shaft for returning the screw conve or. Y

2. press comprising a body portion having a feed opening and a discharge opening, i

12") are a rotatable shaft and va screw vcarried there-A by for continuously feeding material yfrom said feed opening to said discharge opening and for simultaneously expressing said material, and means for screw from said body' portion to permit cleaning and prevent binding of the pre.

3. The combination a's set forth in claim 2 in which said last mentioned means comprises a threaded extension of said shaft, `and a threaded member into which said threaded extension is adapted to fit.

4:. The combination as set forth in claim 2 in which said last mentioned means comprises a threaded extension of said shaft, ka

extension is adapted to vt, together with a `fixed bearing member in which'said threaded member is rotatably mounted.

5. The combination as set forth in claim `2 in which said last mentioned means comwithdrawing said threaded member into which said threaded 6. 4The combinationvas set forth in claim 2 together with means adapted to drive said first mentioned means when wholly Vwithin said body ortion and also when withdrawn from said l:body portion for cleaning.

STANLEY HILLER. 

